Best Semiconductor Materials Stocks

The chip supply chain runs in roughly four layers. At the top are the designers (NVIDIA, AMD, Broadcom) who specify a chip. Below them are the manufacturers, foundries like TSMC and memory makers like Micron, who build it. They buy tools from equipment makers such as ASML, Applied Materials and Lam Research. At the bottom are the materials suppliers, who sell to both the fabs and the toolmakers.

The money in that bottom layer moves differently. Equipment is bought when a fab is built or expanded, so tool orders rise and fall with capital budgets. Materials are consumed every time a wafer goes through a step, so they track how busy existing fabs are. That makes the stream smaller but steadier. SEMI reported that global semiconductor materials revenue hit a record $73.2 billion in 2025, up 6.8%, with wafer fab materials at $45.8 billion (up 5.4%) and packaging materials at $27.4 billion (up 9.3%). In the same year SEMI put equipment billings at $135 billion, up 15%. Taiwan was the largest buyer of materials for the 16th straight year at $21.7 billion, followed by China at $15.6 billion and South Korea at $11.2 billion.

Three features of the theme come up again and again.

• Intensity rises with each node. SEMI attributes 2025 growth to advanced-node and high-bandwidth memory production, and called out lithography materials and wet chemicals for double-digit gains. Smaller transistors take more steps, purer chemicals and more layers per wafer.
• Packaging is where AI shows up fastest. Packaging materials grew faster than fab materials in 2025, led by substrates and bonding wire. SEMI credited higher gold prices for part of the bonding wire gain and stronger demand for advanced substrates, which AI accelerators built from several dies rely on.
• Supply is concentrated and political. Gallium, germanium and rare earths are refined mostly in China, which has used export licensing on them since 2023. That concentration is a risk for some suppliers and the reason others are held.

For the wider market picture, see the semiconductor market statistics.

Two numbers do most of the work in explaining this group. The first is how many wafers the world's fabs actually process, which drives consumables like slurries, gases, filters and precursors. The second is how much chipmakers spend building and equipping new fabs, which drives the subsystem suppliers and, a year or two later, adds the capacity that will consume more materials.

On the first, SEMI's Silicon Manufacturers Group reported in February 2026 that worldwide silicon wafer shipments rose 5.8% in 2025 to 12,973 million square inches, led by epitaxial wafers for advanced logic and polished wafers for high-bandwidth memory. Wafer revenue slipped 1.2% to $11.4 billion over the same year, because pricing for older, non-AI chips had not recovered. That split is a useful reminder that volume and price can move apart: more wafers going through fabs helps Entegris and the gas suppliers, while the wafer makers themselves saw lower revenue.

On the second, SEMI projected in April 2026 that spending on 300mm fab equipment would rise 18% to $133 billion in 2026 and 14% to $151 billion in 2027, with logic leading and memory second. Ultra Clean, Ichor and MKS sell into that budget directly, so their revenue follows it with little delay. The consumables suppliers follow it later and more gently, since a new fab only starts buying chemicals in volume once it is running.

That timing gap explains why the group rarely moves as one. In a year when capex jumps, subsystem names tend to lead. In a year when capex pauses but existing fabs stay busy, consumables and gases tend to hold up better. A materials basket that mixes both is partly hedged against which of the two numbers disappoints first.

The names below are grouped by what each supplies, from the chemicals touching the wafer to the subsystems that deliver them. Each note covers what the business does and why it is commonly held, with figures from its stock page as of October 2026. None of it says whether you should own the stock.

A few names turn up on materials screens without much chip exposure. Hexcel (HXL) makes carbon fiber composites for aircraft, and ATI above is mostly aerospace too. They are specialty materials stocks, but owning them is a bet on Boeing and Airbus build rates, not on fab utilization. Cabot, which sells some electronic materials, is another name that comes up in the same conversation.

The same 16 names in one table, by what each supplies rather than by rank.

• The chip cycle still reaches them. Consumables hold up better than equipment when fabs slow, but a memory downturn or a pause in AI spending cuts wafer starts, and subsystem suppliers like Ultra Clean and Ichor fall with tool orders. The wafer makers' own 2025 shows how uneven it can be: shipments rose while revenue fell, because demand for older chips stayed weak even as AI chips boomed.
• Customer concentration. A few fabs and a few toolmakers buy most of what these companies sell. One large customer changing plans can move a smaller supplier's year. Entegris lists TSMC, Samsung, Intel, SK Hynix and Micron as its core customers, so a delayed node ramp at one of them shows up in its orders. Ichor depends on two customers, Lam Research and Applied Materials, for most of its revenue, and Ultra Clean's top few clients regularly account for more than 70% of its sales.
• China policy. China imposed export licensing on gallium and germanium in August 2023, banned shipments of them to the US in December 2024, and in November 2025 suspended that ban until November 27, 2026, while keeping the licensing regime. AXT, with most of its production in China, is directly exposed to each turn.
• Valuation after a strong year. Several of these names rose sharply in 2026: Materion nearly doubled and Entegris gained about 59%. As of October 2026 they traded near 30 and 28 times forward earnings, which leaves less room for disappointment.
• Single-company stories. Wolfspeed is a post-bankruptcy turnaround, Atomera is pre-revenue, and MP Materials is still building out its magnet business. These carry risks that have little to do with the broader theme.

These names also tend to move together, since much of the group depends on the same fab spending. A basket of twelve materials stocks is still one theme.

A list is an input. Turning it into a portfolio means deciding which layers you want, how much each name gets, and what you will compare it against. A common way to approach it:

• Pick the layers. Gases and consumables behave like steady compounders. Substrates and subsystems behave like small-cap cyclicals. A basket of only one kind is a different bet from a mix.
• Set target weights. Give each name a percentage that adds to 100, so a micro-cap like Atomera cannot quietly become a large share of the basket.
• Pick a benchmark. Compare the basket with the S&P 500 and with a semiconductor ETF such as SMH or SOXX, which show whether the materials tilt adds anything over owning the chipmakers.
• Review as weights move. Strong years like 2026 push a few names well past their targets.

Walnut, an AI investing app, is built for this. You create a basket from the stocks you choose, set a target weight for each, and see how it would have tracked against the S&P 500. Connect your brokerage and the AI assistant can read your actual holdings, so you can see how much chip exposure you already own before adding more. Any trade toward your targets is placed at your own broker and only with your approval. Walnut does not tell you which stocks to buy.

This is not a ranking or a forecast. Names were included because they are commonly held and discussed for chip materials exposure, because together they cover each thing a fab buys (chemicals, gases, wafers, metals and the subsystems that deliver them), and because each has its own stock page with current figures. Some smaller or riskier names are included on purpose, so the page shows the full spread of the theme rather than only its safest corner. Company facts change; verify current details before acting on any of them.